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996 low on coolant


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Hello,

Some time ago the light from my temp gauge started blinking during a fast ride on the German Autobahn. And yes, as Izzy suggested, the car was low on coolant. I drove the car to my Porsche dealer and they explained what had happened. Due to high temperature the coolant hoses expand. The coolant level drops and the sensor 'detects' that the car is low on coolant.

I checked the car when the engine was cold. The coolant level was somewhere between min. and max. This expalins the flashing light. Happens more often according to Porsche. Bought some Porsche coolant and was given the advice to mix it with 50% water.

Question: Is it really necessary to mix the coolant with water and if so do I have to use demineralised water or not?

jo996

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Hello,

Some time ago the light from my temp gauge started blinking during a fast ride on the German Autobahn. And yes, as Izzy suggested, the car was low on coolant. I drove the car to my Porsche dealer and they explained what had happened. Due to high temperature the coolant hoses expand. The coolant level drops and the sensor 'detects' that the car is low on coolant.

I checked the car when the engine was cold. The coolant level was somewhere between min. and max. This expalins the flashing light. Happens more often according to Porsche. Bought some Porsche coolant and was given the advice to mix it with 50% water.

Question: Is it really necessary to mix the coolant with water and if so do I have to use demineralised water or not?

jo996

If you're just topping up then I wouldn't bother and use the antifreeze straight from the bottle. If you're refilling an empty system then yes it is important to use the correct mixture for corrosion prevention, freeze protection etc and pure water is actually more effective in heat transfer believe it or not. So filling 100% antifreeze is actually not good but for topping up IMO absolutely fine.

Hope this helps,

Richard.

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